CATALOGUE. 73 Talinum aueantiacum, Engelm., var. angustissimum, Gray.—Similarto the above, except that the leaves are linear, the articulation of thepeduncle often nearer the axil, sepals approaching the orange color of thecorolla, and the plant usually lower, averaging 8' in height. (538.) Rockyledges at Chiricahua Agency, Arizona. Talinum patens, Willd.?—1-2° high, glaucous; leaves broadly lanceo¬late, thin, entire; flowers purple, in bud twice longer than the obtusesepals; inflorescence loose, panicled along the slender branches; seeds notmature • enough to certainly identify the specimen. (522.) ChiricahuaAgency, Arizona, on rocky ledges, along with T. aurantiacum var. angus¬tissimum. Calandeinia* pygm^a. Gray (Proc. Am. Acad, viii, p. 623). (Tali¬num pygmoeum. Gray.)—Colorado. (73.) Claytonia aetica, Adams, var. megaehiza, Gray.—High mountainsof Colorado; strictly alpine. The large root penetrates a foot or moreamong the rocks. (74.) Claytonia Chamissonis, Esch. & Ledeb.—Seeds evenly and beautifullyroughened with minute scale-like markings. I find no allusion underdescription of this species to the markings of the seed, nor have I any ripeseed in other authentically determined specimens of the species, but in allthe other characteristics my plant is so like the broader-leaved form.No. 84, of Hall and Harbour, that I cannot doubt the specific identity ofthe two. (219.) Willow Spring, Ariz.; altitude, 7,195 feet. Foundgrowing luxuriantly in spring water the temperature of which was 52°Fahrenheit. Claytonia Caeoliniana, Michx., var sessilifolia, Torr. (C. lanceolata,Pursh.)—Nevada. Lewisia eediviva, Pursh.—Nevada. ELATINE^. Elatine Ameeicana, Arn.—Twin Lakes, San Luis Valley, and RioGrande at Loma, Colo. (775, 776.) * Calandeinia, H. B. K.—Differs from Talinum, Adans., chiefly in having persistent sepals andestrophiolate seeds.